<template>
  <view class="cart-container" v-if="cart.length !== 0">
    <!-- 收货地址的组件 -->
    <my-address></my-address>
    
  <!-- 购物车商品列表的标题区域 -->
  <view class="cart-title">
    <!-- 左侧的图标 -->
    <uni-icons type="shop" size="18"></uni-icons>
    <!-- 右侧的文本 -->
    <text class="cart-title-text">购物车</text>
  </view>
  
  <!-- 循环渲染购物车的商品信息 -->
  <!-- <block v-for="(goods,i) in cart" :key="i"> -->
   <!-- <my-goods :goods="goods" :show-radio="true" :show-num="true" @radio-change="radioChangeHandler" @num-change="numChangeHandler"></my-goods> -->
  <!-- </block> -->
  
  <!-- uni-swipe-action 是最外层包裹性质的容器 -->
  <uni-swipe-action>
      <block v-for="(goods,i) in cart" :key="i">
    <uni-swipe-action-item :options="options" @click="swipeActionClickHandler(goods)">
       <my-goods :goods="goods" :show-radio="true" :show-num="true" @radio-change="radioChangeHandler" @num-change="numChangeHandler"></my-goods>
    </uni-swipe-action-item>
     </block>
  </uni-swipe-action>
  
  <!-- 使用自定义的结算组件 -->
  <my-settle></my-settle>
  
  </view>
  
  <!-- 空白购物车的区域 -->
  <view class="empty-cart" v-else>
    <image src="/static/cart_empty@2x.png" class="empty-img"></image>
    <text class="tip-text">空空如也~~~</text>
  </view>
</template>

<script>
  // 按需导入 mapGetters 这个辅助方法
// import  {mapGetters} from 'vuex'
import badgeMix from '@/mixins/tabbar-badge.js'
import {mapState,mapMutations} from 'vuex'
  
  export default {
    mixins:[badgeMix],
    computed: {
      // 将 m_cart 模块中的 cart 数组映射到当前页面中使用
      ...mapState('m_cart',['cart'])
    },
    data() {
      return {
        options:[{
          text:'删除',
          style: {
            backgroundColor:'#C00000'
          }
        }]
      };
    },
    methods: {
    ...mapMutations('m_cart',['updateGoodsState','updateGoodsCount','removeGoodsById']),
    radioChangeHandler(e) {
      // console.log(e)
      this.updateGoodsState(e)
    },
    // 商品的数量发生了变化
    numChangeHandler(e) {
      // console.log(e)
     this.updateGoodsCount(e) 
    },
    // 点击了滑动操作按钮
    swipeActionClickHandler(goods) {
      // console.log(goods)
      this.removeGoodsById(goods.goods_id)
    }
    }
  }
</script>

<style lang="scss">
.cart-title {
  height: 40px;
  display: flex;
  align-items: center;
  padding-left: 5px;
  border-bottom: 1px solid #EFEFEF;
  
  .cart-title-text {
    font-size: 14px;
    margin-left: 10px;
  }
}

.cart-container {
  padding-bottom: 50px;
}

.empty-cart {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 150px;
  
  .empty-img {
    width: 90px;
    height: 90px;
  }
  .tip-text {
    font-size: 12px;
    color: gray;
    margin-top: 15px;
  }
}
</style>
